thank you very much! althrough there are still a lot of work and easy to make mistakes through modify codes, i prefer the old method to repeat draw and set 30x8 times, however, if there are 100 houses x 30 sensors or 1000 house will be a huge workload.

for example, there is a 8 room house, each room have a temperature sensor, so I put 8 analog points on the photo. But the whole building has 30 sets of such houses with the same layout. so I do not want to upload the same picture 30 times and put those analog points on each photo one by one manually for repeat 30 times.
so I hope they can share the same layout photo and analog points, and when i click link "house01", the background layout photo do not change, but the analog points' value switch to show house01's temperature, and when i click link "house02", the background layout photo do not change, but those points' value automatically change to show house02's, and so on. how to handle this?

how to change points automatically without change background photo? i wanto make a drop menu for selection, when i select number01 then point change to show the value of "PLC01 - temperature", when i select drop menu number02 the data shows on photo can be automatically change to "PLC02 - temperature" value, etc.